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The continuity of electrical energy is inseparable from the reliability of the power system. In the event of a disruptive circumstance, the utilization of slack buses facilitates the transfer of functions from one primary source to another primary source. The Slack Bus is a solution aimed at mitigating the discrepancy between the load demand and the available producing capacity resulting from network losses. This study involved the simulation of the electric power system's operation by assigning the slack bus to three distinct locations, specifically bus-1 (Bakaru), bus-31 (Punagaya), and bus-37. The subject of discussion is Sengkang, a region in South Sulawesi. The simulation of the SULSELBAR 56-bus electrical system in the year 2022 was conducted using MATLAB 2013a software. The simulation results indicate that the smallest overall losses occur when Bus Sengkang is selected as the slack bus, with total losses amounting to 123.11 MW and 499.72 MVAr. [ABSTRACT FROM AUTHOR]

In improving the quality management system, the testing laboratory uses the ISO / IEC 17025 standard as a benchmark for the general requirements of testing / calibration competence, including sampling. This standard is also used for quality, administrative and technical activities. Customer laboratories, regulators and accreditation bodies may also use them to confirm or acknowledge the competence of the laboratory. The application of standards in laboratory testing is closely related to achieving the quality objectives contained in the laboratory. By using the standard ISO / IEC 17025 then the resulting product is guaranteed security, reliable and certainly has a quality that no doubt. Testing laboratory can be said to run effectively when it can manage or manage flexibility, customer, production, value-oriented, and the main job of its employees. Therefore, the analysis of the effectiveness of ISO / IEC 17025 implementation takes an important role for the testing laboratory. The Focus Group Discussion (FGD) method consisting of several competent assessors is instrumental in assessing any clauses related to the effectiveness of ISO implementation. [ABSTRACT FROM AUTHOR]